EP1692907B1 - Additional information for voice group call service - Google Patents

Additional information for voice group call service Download PDF

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Publication number
EP1692907B1
EP1692907B1 EP04798011A EP04798011A EP1692907B1 EP 1692907 B1 EP1692907 B1 EP 1692907B1 EP 04798011 A EP04798011 A EP 04798011A EP 04798011 A EP04798011 A EP 04798011A EP 1692907 B1 EP1692907 B1 EP 1692907B1
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EP
European Patent Office
Prior art keywords
additional information
group call
vgc
voice group
message
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Active
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EP04798011A
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German (de)
French (fr)
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EP1692907A1 (en
Inventor
Volker Brass
Walter Grethe
Thomas Sieredzki
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Telekom Deutschland GmbH
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T Mobile Deutschland GmbH
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Priority to PL04798011T priority Critical patent/PL1692907T3/en
Priority to EP04798011A priority patent/EP1692907B1/en
Priority to SI200431381T priority patent/SI1692907T1/en
Publication of EP1692907A1 publication Critical patent/EP1692907A1/en
Application granted granted Critical
Publication of EP1692907B1 publication Critical patent/EP1692907B1/en
Priority to CY20101100307T priority patent/CY1110068T1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention generally relates to the field of voice group services in mobile communication networks, and in particular to Voice Group Call Services (VGCS).
  • VGCS Voice Group Call Services
  • Voice Group Call Service allows the establishment of a call between members of a group in numerous cells of the mobile telecommunication network simultaneously. These cells define the service area. All subscribers belonging to the group have the possibility to listen to the call in the service area. It is also possible to participate in the call individually. Service subscribers of the radio network can become group members on a network wide basis to one or more groups pre-defined in the network by a corresponding group identification (group ID). The membership enables them to receive voice group calls associated with that group ID. In addition, certain group members are entitled by their subscription to initiate Voice Group Calls (VGC). In addition to subscriber details in the Home Location Register (HLR), it is necessary for the mobile station (MS) to be aware of its group membership by storing details on the Subscriber Identity Module (SIM).
  • HLR Home Location Register
  • SIM Subscriber Identity Module
  • each service subscriber can set to active state or deactive state the group ID or any one out of his several group IDs on the SIM. In active state the subscriber can initiate VGCs to that group ID. When in deactive state the subscriber can not make VGCs to the group and the mobile station ignores any notification for that group ID.
  • a group call area can be restricted to a single Mobile Switching Center (MSC) area or can exceed one MSC area (implementation option).
  • a voice group call is initiated by a calling subscriber by a related man machine interface action for the service selection and the group ID dialled.
  • the MSC in which the voice group call is initiated obtains by requesting a Group Call Register GCR the group call attributes.
  • the GCR is a functionality in the network containing the group call attributes. This GCR interrogation after call initiation also determines whether the MSC acts as group call Anchor- or as group call Relay-MSC.
  • a group call Anchor-MSC is responsible for managing and maintaining a particular VGC.
  • the group call Anchor-MSC is determined as the one controlling the cells of the group call area.
  • the group call Anchor-MSC is predefined in the network.
  • a group call Relay-MSC controls cells of a group call area which are not under control of the group call Anchor-MSC for those voice group call services where the group call area exceeds one MSC area. If the MSC is not the Anchor-MSC then the call will be "forwarded" from the Relay-MSC to the respective Anchor-MSC (information also delivered by GCR) and further "call-establishment" is done by the Anchor-MSC.
  • a voice group call channel is a downlink to be allocated in each cell of the group call area for a particular voice group call. All mobile stations being service subscribers for that Voice Group Call in one cell listens to the common downlink. All mobile stations of the listening service subscribers in one cell only listens to the same common downlink (voice group call channel). Of course it is possible to change the talker at any time, so that one of the listeners of the group becomes the talker and the previous talker becomes a listener.
  • US 2003/0100326 A1 relates to a group location and route sharing system for communication units in a trunked communication system, wherein the communication units are engaged in a group voice call communication.
  • Subscription and location data can be sent as a supplementary information to the group voice call communication by using an underlying packet transport layer.
  • VGCS Voice Group Call Service
  • additional information for example the tactical addresses of the current talker.
  • the information contained here may have a text-oriented or binary-oriented character.
  • the transmission of the additional information shall be realised only in acknowledged mode and is sent on the Slow Associated Control Channel (SACCH), which represents an associated control channel for the downlink traffic channel of the voice group call.
  • SACCH Slow Associated Control Channel
  • Figure 1 shows a functional voice group call architecture with a group call register.
  • Figure 2 shows a transfer of additional information to members of a VGCS.
  • GSM Global System for Mobile communications
  • GCR group call register
  • the GCR function is mainly a database function, holding information about voice group calls.
  • the signalling between the entities shown in figure 1 shall be as defined in the following.
  • the Mobile Switching Center (MSC) 12a, 12b, 12c containing the cell within which this voice group call is initiated performs subscription checking against Visitor Location Register (VLR) 14a, 14b, 14c and Home Location Register 16 records. It then consults its GCR 10a, 10b, 10c, respectively, to determine the group call attributes related to its MSC area and whether it is the group call Anchor-MSC 12a for that voice group call. If it is not, the GCR provides with the group call reference and the routing information identifying the group call Anchor-MSC 12a to the originating MSC. The originating MSC then routes the voice group call to the Anchor-MSC 12a.
  • VLR Visitor Location Register
  • the originating MSC is the group call Anchor-MSC 12a, along with the group call attributes, the respective GCR 10a provides information on all group call Relay-MSCs 12b, 12c to be involved.
  • the group call Anchor-MSC 12a sets up links to all group call Relay-MSCs 12b, 12c.
  • Each MSC 12a, 12b, 12c involved in a voice group call obtains its proper group call attributes from the GCR 10a, 10b, 10c related to the respective MSC.
  • the GCR 10a, 10b, 10c holds for a related MSC area for each group ID and cells from which voice group calls can be established by service subscribers the group call reference to be used for a voice group call to be established and an indication whether the originating MSC is the group call Anchor-MSC 12a. If the originating MSC is the group call Anchor-MSC 12a, the GCR 10a provides the group call attributes related to that group call reference to the originating MSC and the originating MSC establishes the voice group call. If the originating MSC is not the Anchor-MSC 12a, the GCR 10a provides the group call reference plus the routing information identifying the Anchor-MSC 12a to the originating MSC and the originating MSC routes the voice group call to the Anchor-MSC 12a.
  • an additional information can be forwarded to all group members during an ongoing voice group call. This is preferably done by transmitting a message containing the additional information on the associated control channel for the traffic channel of the voice group.
  • the MSC 12 (either Anchor- or Relay-MSC) triggers via an appropriate message, e.g. an additional-information-request-message, on the A-interface the base station subsystem (BSS) 20 to send the additional information to the mobile stations MS 22, 24 of the group members, i.e. one talker 22 and at least one listener 24.
  • the message contains at least the additional information itself.
  • the VGC-ID or VGC-Reference represents an optional part of this message.
  • the message i.e. the additional-information-request-message, can be sent on the resource controlling SCCP-connections.
  • the BSS 20 transmits the additional information on the SACCH of all TCHs where the VGC is ongoing, so that the additional information can be received by all MS 22, 24 participating in the voice group.
  • the provisioning of the additional information in radio cells which are belonging to the VGC-area but in which a VGC-channel is not established is not necessary.
  • the BSS 20 is responsible to transmit the additional information on all SACCHs for this VGC.
  • the BSS 20 After having sent the additional information, the BSS 20 provides an acknowledge information to the MSC 12 that the additional information was sent to the mobile stations 22, 24. However, this acknowledge information does not confirm to the sender of the message that the individual members of a voice group call have received the message.
  • the talker 22 may send an acknowledgement on the Uplink-SACCH for this VGC.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Telephonic Communication Services (AREA)
  • Machine Translation (AREA)

Abstract

A method and system for providing the active members of a Voice Group Call Service with additional information. The additional information is transmitted in a message on the associated control channel for the downlink traffic channel of the voice group. The additional information is transmitted simultaneously to an ongoing voice group call.

Description

  • The present invention generally relates to the field of voice group services in mobile communication networks, and in particular to Voice Group Call Services (VGCS).
  • Voice Group Call Service allows the establishment of a call between members of a group in numerous cells of the mobile telecommunication network simultaneously. These cells define the service area. All subscribers belonging to the group have the possibility to listen to the call in the service area. It is also possible to participate in the call individually. Service subscribers of the radio network can become group members on a network wide basis to one or more groups pre-defined in the network by a corresponding group identification (group ID). The membership enables them to receive voice group calls associated with that group ID. In addition, certain group members are entitled by their subscription to initiate Voice Group Calls (VGC). In addition to subscriber details in the Home Location Register (HLR), it is necessary for the mobile station (MS) to be aware of its group membership by storing details on the Subscriber Identity Module (SIM). This is required because it responds to notification messages which include only the group call relevant information, (i.e. no IMSI or TMSI details). Having become a group member, each service subscriber can set to active state or deactive state the group ID or any one out of his several group IDs on the SIM. In active state the subscriber can initiate VGCs to that group ID. When in deactive state the subscriber can not make VGCs to the group and the mobile station ignores any notification for that group ID.
  • A group call area can be restricted to a single Mobile Switching Center (MSC) area or can exceed one MSC area (implementation option). A voice group call is initiated by a calling subscriber by a related man machine interface action for the service selection and the group ID dialled. The MSC in which the voice group call is initiated obtains by requesting a Group Call Register GCR the group call attributes. The GCR is a functionality in the network containing the group call attributes. This GCR interrogation after call initiation also determines whether the MSC acts as group call Anchor- or as group call Relay-MSC. A group call Anchor-MSC is responsible for managing and maintaining a particular VGC. The group call Anchor-MSC is determined as the one controlling the cells of the group call area. For VGCSs where the group call area exceeds an MSC area, the group call Anchor-MSC is predefined in the network. A group call Relay-MSC controls cells of a group call area which are not under control of the group call Anchor-MSC for those voice group call services where the group call area exceeds one MSC area.
    If the MSC is not the Anchor-MSC then the call will be "forwarded" from the Relay-MSC to the respective Anchor-MSC (information also delivered by GCR) and further "call-establishment" is done by the Anchor-MSC.
  • When a calling subscriber (talker) initiates a voice group call, one voice group call channel is established in each cell of the group call area and notifications for that call are sent in each of these cells. A voice group call channel is a downlink to be allocated in each cell of the group call area for a particular voice group call. All mobile stations being service subscribers for that Voice Group Call in one cell listens to the common downlink. All mobile stations of the listening service subscribers in one cell only listens to the same common downlink (voice group call channel). Of course it is possible to change the talker at any time, so that one of the listeners of the group becomes the talker and the previous talker becomes a listener.
  • The standards of Voice Group Call Service are specified in the technical specification ETSI TS 143 068, V5.2.0, December 2002: "Digital cellular telecommunication system (Phase 2+); Voice Group Call Service (VGCS); Stage 2; 3GPP TS 43.068 version 5.2.0 Rel. 5.
  • US 2003/0100326 A1 relates to a group location and route sharing system for communication units in a trunked communication system, wherein the communication units are engaged in a group voice call communication. Subscription and location data can be sent as a supplementary information to the group voice call communication by using an underlying packet transport layer.
  • It is the object of the invention to enhance the conventional voice group call service by providing an additional communication service without changing the general architecture of the communication network.
  • This object is achieved by providing a method and a communication system as disclosed in the independent claims.
  • Other features which are considered to be characteristic for the invention are set forth in the appended dependent claims.
  • The additional information for Voice Group Call Service (VGCS) is designed to provide all active members of a VGCS in parallel, i.e. simultaneous to an ongoing voice group call, with additional information, for example the tactical addresses of the current talker. The information contained here may have a text-oriented or binary-oriented character.
  • The transmission of the additional information shall be realised only in acknowledged mode and is sent on the Slow Associated Control Channel (SACCH), which represents an associated control channel for the downlink traffic channel of the voice group call.
  • In the following the invention will be described with reference to the appended drawings.
  • Figure 1 shows a functional voice group call architecture with a group call register.
  • Figure 2 shows a transfer of additional information to members of a VGCS.
  • The general architecture of GSM is maintained. In addition, a network function is required which is used for registration of the group call attributes, the group call register (GCR) 10a, 10b, 10c. The GCR function is mainly a database function, holding information about voice group calls. The signalling between the entities shown in figure 1 shall be as defined in the following.
  • The Mobile Switching Center (MSC) 12a, 12b, 12c containing the cell within which this voice group call is initiated performs subscription checking against Visitor Location Register (VLR) 14a, 14b, 14c and Home Location Register 16 records. It then consults its GCR 10a, 10b, 10c, respectively, to determine the group call attributes related to its MSC area and whether it is the group call Anchor-MSC 12a for that voice group call. If it is not, the GCR provides with the group call reference and the routing information identifying the group call Anchor-MSC 12a to the originating MSC. The originating MSC then routes the voice group call to the Anchor-MSC 12a. If the originating MSC is the group call Anchor-MSC 12a, along with the group call attributes, the respective GCR 10a provides information on all group call Relay- MSCs 12b, 12c to be involved. The group call Anchor-MSC 12a sets up links to all group call Relay-MSCs 12b, 12c. Each MSC 12a, 12b, 12c involved in a voice group call obtains its proper group call attributes from the GCR 10a, 10b, 10c related to the respective MSC.
  • The GCR 10a, 10b, 10c holds for a related MSC area for each group ID and cells from which voice group calls can be established by service subscribers the group call reference to be used for a voice group call to be established and an indication whether the originating MSC is the group call Anchor-MSC 12a. If the originating MSC is the group call Anchor-MSC 12a, the GCR 10a provides the group call attributes related to that group call reference to the originating MSC and the originating MSC establishes the voice group call. If the originating MSC is not the Anchor-MSC 12a, the GCR 10a provides the group call reference plus the routing information identifying the Anchor-MSC 12a to the originating MSC and the originating MSC routes the voice group call to the Anchor-MSC 12a.
  • According to the invention, an additional information can be forwarded to all group members during an ongoing voice group call. This is preferably done by transmitting a message containing the additional information on the associated control channel for the traffic channel of the voice group.
  • As shown in figure 2, the MSC 12 (either Anchor- or Relay-MSC) triggers via an appropriate message, e.g. an additional-information-request-message, on the A-interface the base station subsystem (BSS) 20 to send the additional information to the mobile stations MS 22, 24 of the group members, i.e. one talker 22 and at least one listener 24. The message contains at least the additional information itself. The VGC-ID or VGC-Reference represents an optional part of this message.
  • In the case where the message is sent on the controlling SCCP-connection (Signalling Connection Control Part connection) of the VGC, the addressing which VGC is meant is not necessary.
  • In addition to this, the message, i.e. the additional-information-request-message, can be sent on the resource controlling SCCP-connections.
  • Afterwards, the BSS 20 transmits the additional information on the SACCH of all TCHs where the VGC is ongoing, so that the additional information can be received by all MS 22, 24 participating in the voice group. The provisioning of the additional information in radio cells which are belonging to the VGC-area but in which a VGC-channel is not established is not necessary.
  • In the case that the additional information is sent on the controlling SCCP-connection, the BSS 20 is responsible to transmit the additional information on all SACCHs for this VGC.
  • After having sent the additional information, the BSS 20 provides an acknowledge information to the MSC 12 that the additional information was sent to the mobile stations 22, 24. However, this acknowledge information does not confirm to the sender of the message that the individual members of a voice group call have received the message.
  • In order to give an indication that the additional information was at least received by the current talker 22, the talker 22 may send an acknowledgement on the Uplink-SACCH for this VGC.
    • List of reference numerals and abbreviations
    • 10a, 10b, 10c
    Group Call Register
    12a, 12b, 12c
    Mobile Switching Center
    14a, 14b, 14c
    Visitor Location Register
    16
    Home Location Register
    18
    Gateway Mobile Switching Center
    20
    Base Station Subsystem
    22
    MS (Talker)
    24
    MS (Listener)
    BSS
    Base Station Subsystem
    MS
    Mobile Station
    MSC
    Mobile Switching Centre
    SACCH
    Slow Associated Control Channel
    SCCP
    Signalling Connection Control Part
    TCH
    Traffic Channel
    VGC
    Voice Group Call
    VGCS
    Voice Group Call Service

Claims (7)

  1. Method for providing active members of a Voice Group Call Service, VGCS, with additional information, wherein the additional information is transmitted in a message on an associated control channel for a traffic channel of the voice group, wherein the message contains a voice group call ID, VGC-ID, or a voice group call Reference, VGC reference, wherein a mobile switching center, MSC, (12) triggers via a message, additional-information-request-message, on an A-interface a base station subsystem, BSS, (20), to send the additional information to the group members, wherein the additional information is sent on a controlling signaling connection control part, SCCP, connection, wherein the BSS (20) is responsible for sending the additional information on all slow associated control channels, SACCHs, for this VGC, and wherein simultaneous to an ongoing voice group call the BSS (20) sends the additional information on a slow associated control channel, SACCH, of all traffic channels, TCHs, where the voice group call is ongoing.
  2. Method according to claim 1, characterized in that the message is sent on resource controlling SCCP-connections.
  3. Method according to claim 1, characterized in that the message is sent on a controlling SCCP-connection of the VGC without addressing a meant VGC.
  4. Method according any of claims 1-3, characterized in that the additional information is not provided in radio cells which are belonging to the VGC-area but in which a VGC-channel is not established.
  5. Method according any of claims 1-4, characterized in that after having sent the additional information, the BSS (20) provides an acknowledge information to the MSC (12) that the additional information was sent to mobile stations, MSs, (22, 24).
  6. Method according any of claims 1-5, characterized in that in order to give an indication that the additional information was at least received by a current talker (22), the talker sends an acknowledgement on a Uplink-SACCH for this VGC.
  7. System for providing members of a Voice Group Call Service, VGCS, with additional information, comprising: signal processing units for speech transmission purposes in combination with signal processing units for dedicated text-and/or binary signal transmission, wherein the additional information contains a voice group call ID, VGC-ID, or a voice group call Reference, VGC reference, and a mobile switching center, MSC, (12) is connected via an A-interface to a base station subsystem, BSS, (20) for sending the additional information to the group members via a message, additional-information-request-message, wherein the additional information is sent on a controlling signaling connection control part, SCCP, connection, wherein the BSS (20) is responsible for sending the additional information on all slow associated control channels SACCHs for this VGC, wherein simultaneous to an ongoing voice group call the additional information is sent on a slow associated control channel, SACCH, of all traffic channels, TCHs, where the voice group call is ongoing.
EP04798011A 2003-11-21 2004-11-19 Additional information for voice group call service Active EP1692907B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL04798011T PL1692907T3 (en) 2003-11-21 2004-11-19 Additional information for voice group call service
EP04798011A EP1692907B1 (en) 2003-11-21 2004-11-19 Additional information for voice group call service
SI200431381T SI1692907T1 (en) 2003-11-21 2004-11-19 Additional information for voice group call service
CY20101100307T CY1110068T1 (en) 2003-11-21 2010-03-31 ADDITIONAL INFORMATION FOR VOICE GROUP CALL SERVICES

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03026786 2003-11-21
PCT/EP2004/013159 WO2005055632A1 (en) 2003-11-21 2004-11-19 Additional information for voice group call service
EP04798011A EP1692907B1 (en) 2003-11-21 2004-11-19 Additional information for voice group call service

Publications (2)

Publication Number Publication Date
EP1692907A1 EP1692907A1 (en) 2006-08-23
EP1692907B1 true EP1692907B1 (en) 2010-01-06

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EP (1) EP1692907B1 (en)
AT (1) ATE454794T1 (en)
CY (1) CY1110068T1 (en)
DE (1) DE602004025036D1 (en)
DK (1) DK1692907T3 (en)
ES (1) ES2339355T3 (en)
PL (1) PL1692907T3 (en)
PT (1) PT1692907E (en)
SI (1) SI1692907T1 (en)
WO (1) WO2005055632A1 (en)

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GB2429604A (en) * 2005-08-23 2007-02-28 Siemens Ag Providing information relating to a new active user in a voice group call service
DE102005050850B4 (en) 2005-10-24 2007-10-25 Siemens Ag Method for transmitting data immediately after a change of speaker to at least one listener of an existing group call
CN101060716B (en) * 2006-06-23 2011-02-09 华为技术有限公司 Group call method and group call register for the third generation partner program network
CN101111007A (en) * 2006-07-21 2008-01-23 华为技术有限公司 Method for recognizing relaying mobile switching centre of calling business user by master control mobile switching centre

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Publication number Publication date
SI1692907T1 (en) 2010-05-31
DE602004025036D1 (en) 2010-02-25
ATE454794T1 (en) 2010-01-15
US7460875B2 (en) 2008-12-02
WO2005055632A1 (en) 2005-06-16
EP1692907A1 (en) 2006-08-23
PL1692907T3 (en) 2010-06-30
DK1692907T3 (en) 2010-05-10
ES2339355T3 (en) 2010-05-19
PT1692907E (en) 2010-04-12
CY1110068T1 (en) 2015-01-14
US20070224974A1 (en) 2007-09-27

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